print("Введите скобочную последовательность")
s = input()
s1 = ''

for char in s:
    if char == '(':
        s1 += char

    if char == ')':
        if len(s1) > 0:
            if s1[len(s1) - 1] == '(':
                s1 = s1[:-1]

    if char == '[':
        s1 += char

    if char == ']':
        if len(s1) > 0:
            if s1[len(s1) - 1] == '[':
                s1 = s1[:-1]

if char == '{':
    s1 += char

if char == '}':
    if len(s1) > 0:
        if s1[len(s1) - 1] == '{':
            s1 = s1[:-1]

if char == '<':
    s1 += char

if char == '>':
    if len(s1) > 0:
        if s1[len(s1) - 1] == '<':
            s1 = s1[:-1]



if len(s1) == 0:
    print("Верная")
else:
    print("Неверная")
